/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.runtime.join;

import org.apache.flink.table.dataformat.BaseRow;
import org.apache.flink.util.Collector;

/**
 * Collector to wrap a [[org.apache.flink.table.dataformat.BaseRow]] and to track whether a row has been
 * emitted by the inner collector.
 */
class EmitAwareCollector implements Collector<BaseRow> {

	private boolean emitted = false;
	private Collector<BaseRow> innerCollector;

	void reset() {
		emitted = false;
	}

	boolean isEmitted() {
		return emitted;
	}

	void setInnerCollector(Collector<BaseRow> innerCollector) {
		this.innerCollector = innerCollector;
	}

	@Override
	public void collect(BaseRow record) {
		emitted = true;
		innerCollector.collect(record);
	}

	@Override
	public void close() {
		innerCollector.close();
	}

}
